Roll-winding apparatus drive mechanism

Abstract

A device for reeling web-like material, in which the roll being formed is held between heads borne on carrier arms, which device reels the roll with a central drive. The drive is provided by direct-current, permanent magnet electric motors maximum power output mounted in the carrier arms, in which motors the stator, is faced with permanent magnets made of samarium cobaltate (SmCo 5 ).

We claim: 
     
       1. In a device for reeling a plurality of adjacent webs of paper into separate rolls, wherein laterally-separated carrier arms having longitudinal axes and cross-sectional dimensions at right angles to the longitudinal axes are provided for supporting the rolls being wound in reeling axes, the carrier arms including heads for securing the rolls to be wound, the heads each being individually driven by an electric motor associated with the head, the improvement comprising; the electric motor being a direct current, permanent magnet motor of high power output, and the electric motor having a longitudinal axis disposed parallel to the longitudinal axis of its associated carrier arm and perpendicular to the reeling axis of a roll secured by the head of its associated carrier arm; and said motor having a maximum width taken as a cross-sectional dimension at right angles to the motor longitudinal axis, said motor maximum width being not greater than the cross-sectional dimension of the carrier arm, said motor being disposed in the carrier arm, with a single housing being provided for the carrier arm and motor. 
     
     
       2. The improvement defined in claim 1 in which said motor contains permanent magnets made of rare earth metals. 
     
     
       3. The improvement defined in claim 2 in which said permanent magnets are made of samarium cobaltate (SmCo 5 ). 
     
     
       4. In a device for reeling paper into rolls, the device having laterally separated carrier arms having a longitudinal axis, said carrier arms each being pivotally mounted at one end and each bearing clamping heads at the opposite end for securing a roll to be reeled along a reeling axis, which heads are individually driven by an electric motor associated with each carrier arm concerned, the improvement comprising; said motor being a direct-current permanent magnet motor of high power output, said motor having a longitudinal axis parallel to the longitudinal axis of the carrier arm on which it operates and perpendicular to the reeling axis of a roll secured by the head of the carrier arm, said motor being disposed in said carrier arm, with a portion of said carrier arm being a housing for said motor. 
     
     
       5. The improved device according to claim 4, wherein the motor contains permanent magnets made of samarium cobaltate (SmCo 5 ). 
     
     
       6. The improved device according to claim 4 wherein the electric motor has an external, cross-sectional dimension of between one-hundred fifty and one-hundred eighty millimeters (150-180 mm). 
     
     
       7. The improved device according to claim 4 wherein the electric motor develops a torque of two hundred to two-hundred twenty Newton/meters (200-220 Nm) at two thousand revolutions per minute (2000 rpm) 
     
     
       8. The improved device according to claim 4 wherein permanent magnets of said motor are made of rare earth metals.